Cohort maintenance strategies used by The Irish Longitudinal Study on Ageing (TILDA)

Authors: Donoghue, O., Foley, M. & Kenny, R.A.

Source: Copyright © The Irish Longitudinal Study on Ageing 2017

The Irish Longitudinal Study on Ageing (TILDA) is a large prospective cohort study of the social, economic and health circumstances of community-dwelling adults aged 50 years and over resident in Ireland. As there was no extant panel in Ireland coupling age and address information, all addresses required cold calling at baseline. In this report, we describe the strategies used to retain this cohort over the first three waves of data collection and thereby, provide guidance to new and existing longitudinal cohort studies. The strategies used have been classified into seven broad categories. While we cannot identify the impact of individual strategies, the key strategies that we feel were effective include well-trained personnel, the rapport between participants and data collectors, the inclusion of a health assessment, provision of feedback and flexibility in data collection.

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